Which variant of the s3 are you using and running which OS, the front cam works fine on my i9300 running the latest stock ROM.
Try changing the picture size, the front cam on the s3 uses an odd square picture size by default. If you are running CM then be aware that the CM camera libs are sometimes buggy.
Can you send me a log of the crash if possible.
I tried changing picture size of the front camera. The results are very interesting.
On initial launch, the first pic I snap regardless of the current resolution choice, it will result in camera error.
One initial launch, if I go settings to change resolution, any resolution will work without error. But if I close and reopen camera and snap again, camera error occurs.
Once I set it to fast capture mode, no more error, even on initial launch. So I guess the bug is avoided by using fast capture.
Thanks for your suggestion. I'm very happy with this app again.